Generally speaking, Manifest Destiny had a negative impact on African Americans, since it led to the expansion of the United States, with many of the new states in the west becoming "slave" states. This conflict eventually led to the Civil War, after no compromise could be truly agreed upon.
Banks closed
People lost jobs
Business failed
Families were homeless
Im pretty sure it’s the book of kell (not 100% sure but that’s my guess) hope this helped in any way ! :)
It would be the US. The US economy sky rocketed after WW2.